MCQOPTIONS
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MCQOPTIONS
This section includes 1917 Mcqs, each offering curated multiple-choice questions to sharpen your UGC-NET knowledge and support exam preparation. Choose a topic below to get started.
| 1551. |
P: “Program is a step by step execution of the instructions”. Given P, which of the following is true? |
| A. | Program is a subset of an instruction set. |
| B. | Program is a sequence of a subset of an instruction set. |
| C. | Program is a partially ordered set of an instruction set. |
| D. | All of the above |
| Answer» C. Program is a partially ordered set of an instruction set. | |
| 1552. |
Which of the following is used for grouping of characters into tokens (in a computer)? |
| A. | A parser |
| B. | Code optimizer |
| C. | Code generator |
| D. | Scanner |
| Answer» E. | |
| 1553. |
Which of the following permanent database that has an entry for each terminal symbol ? |
| A. | Literal table |
| B. | Identifier table |
| C. | Terminal table |
| D. | Source table |
| Answer» D. Source table | |
| 1554. |
The contents of Register (BL) and Register (AL) of 8085 microprocessor are 49H and 3AH respectively. The contents of AL, the status of carry flag (CF) and sign flag (SF) after executing 'SUB AL, BL' assembly language instruction, are |
| A. | AL=0FH; CF=1; SF=1 |
| B. | AL=F0H; CF=0; SF=0 |
| C. | AL=F1H; CF=1; SF=1 |
| D. | AL=1FH; CF=1; SF=1 |
| Answer» B. AL=F0H; CF=0; SF=0 | |
| 1555. |
Dead-code elimination in machine code optimization refers to: |
| A. | removal of all labels. |
| B. | removal of values that never get used. |
| C. | removal of function which are not involved. |
| D. | removal of a module after its use. |
| Answer» C. removal of function which are not involved. | |
| 1556. |
In .............., the bodies of the two loops are merged together to form a single loop provided that they do not make any references to each other. |
| A. | Loop unrolling |
| B. | Strength reduction |
| C. | Loop concatenation |
| D. | Loop jamming |
| Answer» E. | |
| 1557. |
Peep-hole optimization is a form of: |
| A. | loop optimization |
| B. | local optimization |
| C. | constant folding |
| D. | data flow analysis |
| Answer» D. data flow analysis | |
| 1558. |
There exists a construct which returns a value ‘true’ if the argument subquery is: |
| A. | empty |
| B. | non-empty |
| C. | in error |
| D. | none of the above |
| Answer» C. in error | |
| 1559. |
The content of the accumulator after the execution of the following 8085 assembly language program, is:MVI A, 42HMVI B, 05HUGC: ADD BDCR BJNZ UGCADI 25HHLT |
| A. | 82 H |
| B. | 78 H |
| C. | 76 H |
| D. | 47 H |
| Answer» D. 47 H | |
| 1560. |
In which way(s) a macroprocessor for assembly language can be implemented ? |
| A. | Independent two-pass processor |
| B. | Independent one-pass processor |
| C. | Expand macrocalls and substitute arguments |
| D. | All of the above |
| Answer» E. | |
| 1561. |
How many states can a process be in? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 1562. |
Portable program means |
| A. | Program with wheels |
| B. | Independent from its authors |
| C. | Independent of platform |
| D. | None of the above |
| Answer» D. None of the above | |
| 1563. |
Which of the following statement(s) regarding a linker software is/are true?I. A function of a linker is to combine several object modules into a single load module.II. A function of a linker is to replace absolute references in an object module by symbolic references to locations in other modules. |
| A. | Only I |
| B. | Only II |
| C. | Both I and II |
| D. | Neither I nor II |
| Answer» D. Neither I nor II | |
| 1564. |
The ‘K’ in LR (K) cannot be: |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | None of these |
| Answer» E. | |
| 1565. |
Tasks done in parsing are: |
| A. | Check the validity of a source string |
| B. | Determine the syntactic structure of a source string |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 1566. |
The scheme of which interpreter translates the source program is known as |
| A. | Paragraph by paragraph |
| B. | Instruction by instruction |
| C. | Line by line |
| D. | None of the above |
| Answer» D. None of the above | |
| 1567. |
Which of the following are not regular?(A) Strings of even number of a’s.(B) Strings of a’s, whose length is a prime number.(C) Set of all palindromes made up of a’s and b’s.(D) Strings of a’s whose length is a perfect square. |
| A. | (A) and (B) only |
| B. | (A), (B) and (C) only |
| C. | (B), (C) and (D) only |
| D. | (B) and (D) only |
| Answer» D. (B) and (D) only | |
| 1568. |
‘Macro’ in an assembly level program is ………….. |
| A. | sub program |
| B. | a complete program |
| C. | a hardware portion |
| D. | relative coding |
| Answer» B. a complete program | |
| 1569. |
Which of the following is the most general phase - structured grammar ? |
| A. | Regular |
| B. | Context – Sensitive |
| C. | Context free |
| D. | None of these |
| Answer» C. Context free | |
| 1570. |
If you want to execute more than one program at a time, the systems software that are used must be capable of: |
| A. | word processing |
| B. | virtual memory |
| C. | compiling |
| D. | multitasking |
| Answer» E. | |
| 1571. |
Which activity is included in the first pass of two pass assemblers? |
| A. | Build the symbol table |
| B. | Construct the intermediate code |
| C. | Separate mnemonic opcode and operand fields |
| D. | All of the above |
| Answer» E. | |
| 1572. |
An example of a compiler-compiler is: |
| A. | JAVA |
| B. | LEX |
| C. | YACC |
| D. | MATLAB |
| Answer» D. MATLAB | |
| 1573. |
In a compiler, the task of scanning the source code, to recognize and classify various elements is known as. |
| A. | Code Optimization |
| B. | Syntactic Analysis |
| C. | Lexical Analysis |
| D. | Semantic Analysis |
| Answer» D. Semantic Analysis | |
| 1574. |
Consider the following program fragment in assembly language. What is the value of ax and cx registers after the completion of the doloop? |
| A. | ax = FFF5 h and cx = 0 h |
| B. | ax = FFF6 h and cx = 0 h |
| C. | ax = FFF7 h and cx = 0A h |
| D. | ax = FFF5 h and cx = 0A h |
| Answer» C. ax = FFF7 h and cx = 0A h | |
| 1575. |
In two pass assembler the symbol table is used to store: |
| A. | Label and value |
| B. | Only value |
| C. | Mnemonic |
| D. | Memory Location |
| Answer» E. | |
| 1576. |
The action of passing the source program into the proper syntactic class is known as: |
| A. | Syntax analysis |
| B. | Lexical analysis |
| C. | Interpretation analysis |
| D. | Uniform symbol generation |
| Answer» C. Interpretation analysis | |
| 1577. |
Which of the following statements is false? |
| A. | Top-down parsers are LL parsers where first L stands for left-to-right scan and second L stands for a leftmost derivation. |
| B. | (000)* is a regular expression that matches only strings containing an odd number of zeroes, including the empty string. |
| C. | Bottom-up parsers are in the LR family, where L stands for left-to-right scan and R stands for rightmost derivation. |
| D. | The class of context-free languages is closed under reversal. That is, if L is any context-free language, then the language LR={WR:wϵL} is context free. |
| Answer» C. Bottom-up parsers are in the LR family, where L stands for left-to-right scan and R stands for rightmost derivation. | |
| 1578. |
Consider the following assembly program segment. The contents of the destination register ax (in hexadecimal) and the status of Carry Flag (CF) after the execution of above instructions are: |
| A. | ax = 003CH; CF = 0 |
| B. | ax = 001EH; CF = 0 |
| C. | ax = 007BH; CF = 1 |
| D. | ax = 00B7H; CF = 1 |
| Answer» B. ax = 001EH; CF = 0 | |
| 1579. |
An operating system is: |
| A. | Collection of hardware components |
| B. | Collection of input-output devices |
| C. | Collection of software routines |
| D. | All the above |
| Answer» D. All the above | |
| 1580. |
Which of the following is not collision resolution technique? |
| A. | Hash addressing |
| B. | Chaining |
| C. | Both a and b |
| D. | Indexing |
| Answer» E. | |
| 1581. |
An assembly program contains: |
| A. | imperative and declarative statements |
| B. | imperative and assembler directives |
| C. | imperative and declarative statements as well as assembler directives |
| D. | declarative statements and assembler directives |
| Answer» D. declarative statements and assembler directives | |
| 1582. |
Which is the correct statement(s) for Non Recursive predictive parser?S1: First(α) = {t | α => * t β for some string β } => *tβS2: Follow(X) = { a | S => * αXa β for some strings α and β } |
| A. | Both statements S1 and S2 are incorrect |
| B. | S1 is incorrect and S2 is correct |
| C. | S1 is correct and S2 is incorrect |
| D. | Both statements S1 and S2 are correct |
| Answer» E. | |
| 1583. |
Symbol table can be used for: |
| A. | Checking type compatibility |
| B. | Suppressing duplication of error message |
| C. | Storage allocation |
| D. | All of these above |
| Answer» E. | |
| 1584. |
When a language has the capability to produce new data types, it is said to be: |
| A. | extensible |
| B. | encapsulated |
| C. | overloaded |
| D. | none of the above |
| Answer» B. encapsulated | |
| 1585. |
Which statement is wrong ? |
| A. | If linked origin ≠ translated origin, relocation must be performed by the linker |
| B. | If load ≠ linked origin, the loader must perform relocation |
| C. | A linker always perform relocation, whereas some loaders do not |
| D. | None of these |
| Answer» E. | |
| 1586. |
Synthesized attribute can be easily simulated by a |
| A. | LL grammar |
| B. | Ambiguous grammar |
| C. | LR grammar |
| D. | None of the above |
| Answer» D. None of the above | |
| 1587. |
Macro-processors are …………. |
| A. | Hardware |
| B. | Compiler |
| C. | Registers |
| D. | None of the above |
| Answer» C. Registers | |
| 1588. |
Which activity is not included in the first pass of two pass assemblers ? |
| A. | Build the symbol table |
| B. | Construct the machine code |
| C. | Separate mnemonic opcode and operand fields |
| D. | None of these |
| Answer» E. | |
| 1589. |
Non modifiable procedures are called: |
| A. | Serially usable procedure |
| B. | Concurrent procedure |
| C. | Re-entrant procedure |
| D. | Top down procedure |
| Answer» D. Top down procedure | |
| 1590. |
Which of the following command the file names in multiple columns? |
| A. | IS–X |
| B. | IS |
| C. | IS–1 |
| D. | IS–f–X |
| Answer» C. IS–1 | |
| 1591. |
Code optimization is responsibility of: |
| A. | Application programmer |
| B. | System programmer |
| C. | Operating system |
| D. | All of the above |
| Answer» C. Operating system | |
| 1592. |
The ............... transfers the executable image of a C++ program from hard disk to main memory. |
| A. | Compiler |
| B. | Linker |
| C. | Debugger |
| D. | Loader |
| Answer» E. | |
| 1593. |
A permanent database of a general model of compiler is................... |
| A. | Identifier table |
| B. | Page map table |
| C. | Literal table |
| D. | Terminal table |
| Answer» E. | |
| 1594. |
Assembler program is: |
| A. | dependent on the operating system |
| B. | dependent on the compiler |
| C. | dependent on the hardware |
| D. | independent of the hardware |
| Answer» D. independent of the hardware | |
| 1595. |
Object code is the output of …………… |
| A. | Operating System |
| B. | Compiler or Assembler |
| C. | only Assembler |
| D. | only Compiler |
| Answer» C. only Assembler | |
| 1596. |
Top-down parsers are predictive parsers, because: |
| A. | next tokens are predicted |
| B. | length of the parse tree is predicted before hand |
| C. | lowest node in the parse tree is predicted |
| D. | next lower level of the parse tree is predicted |
| Answer» B. length of the parse tree is predicted before hand | |
| 1597. |
Which activity is not included in the first pass of two pass assemblers? |
| A. | Build the symbol table |
| B. | Construct the intermediate code |
| C. | Separate mnemonic opcode and operand fields |
| D. | None of the above |
| Answer» E. | |
| 1598. |
In the context of compiler design, “reduction in strength” refers to: |
| A. | code optimization obtained by the use of cheaper machine instructions |
| B. | reduction in accuracy of the output |
| C. | reduction in the range of values of input variables |
| D. | reduction in efficiency of the program |
| Answer» B. reduction in accuracy of the output | |
| 1599. |
Object modules generated by assembler that contains unresolved external references are resolved for two or more object module by a/an |
| A. | Operating system |
| B. | Loader |
| C. | Linker |
| D. | Compiler |
| Answer» D. Compiler | |
| 1600. |
Loading operating system from secondary memory to primary memory is called............... |
| A. | Compiling |
| B. | Booting |
| C. | Refreshing |
| D. | Reassembling |
| Answer» C. Refreshing | |