We have compiled very important and most repeated questions for Binary Online MCQs which are asked in academic as well as in different exams. Most importantly our Online MCQs will help you to evaluate and check your knowledge of computer and IT basics. These Computer Knowledge MCQs will help you to crack any competitive or academic exams.
Youth For Pakistan has provided an excellent opportunity for the students to prepare for their Computer Knowledge Online MCQs test. These Online Computer Knowledge MCQs cover all the topics including MS Powerpoint, MS Word, MS Excel, Information Technology, Hardware, Internet, Operating Systems, Keyboard Shortcuts, Network, Data Structure, DBMS, Security, Abbreviations, Computer Graphics, Output, Memory, Electronics, Input, Marketing, File Location, File Extensions, Software, Programming, Computer Basics, Windows, Binary, Discrete Mathematics, Data Communication, Compiler and OOPS.
The questions about computers are asked in almost every test whether it is for admission to some institutes or for recruitment purposes.
Binary Online MCQs with Answers
We strongly recommend to all of our visitors that they attempt these Binary Online MCQs tests more than one time after completing the preparation so that they can prepare for the Binary MCQs in the best possible way.
1. In Reverse Polish notation, expression A*B+C*D is written as
AB*CD*+src=
A*BCD*+src=
AB*CD+*src=
A*B*CD+
None of thesesrc=
Correct Ans: AB*CD*+
2. Floating point representation is used to store ______.
Boolean values
whole numbers
real integers
integers
None of these
Correct Ans: real integers
3. In computers, subtraction is generally carried out by ______.
9’s complement
10’s complement
1’s complement
2’s complement
None of these
Correct Ans: 2’s complement
4. In signed-magnitude binary division, if the dividend is (11100)2 and divisor is (10011)2 then the result is ______.
(00100)2
(10100)2
(11001)2
(01100)2
None of these
Correct Ans: (10100)2
5. Translation from symbolic program into Binary is done in_____.
Two passes
Directly
Three passes
Four passes
None of these
Correct Ans: Two passes
6. A floating point number that has a O in the MSB of mantissa is said to have_____.
Overflow
Underflow
Important number
Undefined
None of these
Correct Ans: Underflow
7. What is the difference between binary coding and binary coded decimal?
BCD is pure binary.
Binary coding has a decimal format.
Binary coding is pure binary.
BCD has no decimal format.
None of these
Correct Ans: Binary coding is pure binary.
8. 3428 is the decimal value for which of the following binary coded decimal (BCD) groupings?
1.101E+13
1.101E+13
1.101E+13
1.101E+14
None of these
Correct Ans: 1.101E+13
9. In EBCDIC code, maximum possible characters set size is
character set of 356
character set of 756
character set of 556
character set of 256
None of these
Correct Ans: character set of 256
10. In BCD code, maximum possible characters set size is
character set of 64
character set of 84
character set of 94
character set of 104
None of these
Correct Ans: character set of 64
11. The original ASCII code used ______ bits of each byte, reserving that last bit for error checking
5
6
7
8
None of these
Correct Ans: 7
12. Let I denote the formula: (q ==> p) ==> (p ==> q)
Let II denote the formula (p ==> q) ^ q
Which of the following is true?
I is not a tautology and II is not satisfiable.
I is not a tautology and II is satisfiable.
I is satisfiable and II is not satisfiable.
I is a tautology and II is satisfiable.
I is satisfiable and II is a tautology
Correct Ans: I is not a tautology and II is satisfiable.
13. Of the following sorting algorithms, which has a running time that is at LEAST dependent on the initial ordering of the input?
Insertion sort
Quicksort
Merge sort
Selection sort
Shell sort
Correct Ans: Merge sort
14. Of the following, which best characterizes computers that use memory-mapped I/O?
The computer provides special instructions for manipulating I/O ports.
I/O ports are placed at addresses on the bus and are accessed just like other memory locations.
To perform an I/O operation, it is sufficient to place the data in an address register and call the channel to perform the operation.
Ports are referenced only by memory-mapped instructions of the computer and are located at hardwired memory locations
I/O can be performed only when memory management hardware is turned on.
Correct Ans: I/O ports are placed at addresses on the bus and are accessed just like other memory locations.
15. Which of the following is usually NOT represented in a subroutine’s activation record frame for a stack-based programming language?
Values of local variables
A heap area
The return address
Stack pointer for the calling activation record
Information needed to access nonlocal variables
Correct Ans: A heap area
16. An advantage of choosing this implementation of “set of integers” is that adding an element to a set is a contact time operation. Which of the following is a disadvantage of this implementation?
Adding elements to a very small sets could cause error flags to be raised
Deleting elements from very large sets could cause error flags to be raised
Determining whether a set is empty will require nonconstant time.
Constructing the union of two sets will require quadratic time in the size of the set being
constructed
Deleting an element from a set will require exponential time in the size of the set from which
the element is deleted
Correct Ans: Adding elements to a very small sets could cause error flags to be raised
17. A program that checks spelling works in the following way. A hash table has been defined in which each entry is a Boolean variable initialized to false. A hash function has been applied to each word in the dictionary, and the appropriate entry in the hash table has been set to true. To check the spelling in a document, the hash function is applied to every word in the document, and the appropriate entry in the table is examined. Which of the following is (are) correct?
I. true means the word was in the dictionary.
II. false means the word was not in the dictionary.
III. Hash table size should increase with document size.
I only
II only
I and II only
II and III only
I, II and III
Correct Ans: II only
18. A particular disk unit uses a bit string to record the occupancy or vacancy of its tracks, with 0 denoting vacant and 1 denoting occupied. A 32-bit segment of this string has the hexadecimal value D4F E2003. The percentage of occupied tracks for the corresponding part of the disk, to the nearest percent, is
12
25
38
44
62
Correct Ans: 44
19. In multiprogrammed systems it is advantageous if some programs such as editors and compilers can be shared by several users. Which of the following must be true of multiprogrammed systems in order that a single copy of a program can be shared by several users?
I. The program is a macro.
II. The program is recursive.
III. The program is re entrant.
I only
II only
III only
II and III only
I, II and III
Correct Ans: III only
20. Let P be a procedure that for some inputs calls itself (i.e., is recursive). If P is guaranteed to terminate, which of the following statements must be true?
I. P has a local variable.
II. P has an execution path where it does not call itself.
III. P either refers to a global variable or has at least one parameter.
I only
II only
I and II only
II and III only
I, II, and III
Correct Ans: II and III only