PGT Computer Science (Level-3), (HTET Practice MCQs) (Part-VI)

Total Questions: 100

71. Consider the method mcq ( ):

Correct Answer: A. (16, 3, 5)

72. A simple stand - alone software utility is to be developed in 'C' programming by a team of software experts for a computer running Linux and the overall size of this software is estimated to be 20,000 lines of code. Considering (a, b) = (2.4, 1.05) as multiplicative and exponention factor for the basic COCOMO effort estimation equation and (c, d)=(2.5, 0.38) as multiplicative and exponention factor for the basic COCOMO development time estimation equation, approximately how long does the software project take to complete?

Correct Answer: В. 11.52 months

73. In Software Configuration Management (SCM), which of the following is a use-case supported by standard version control systems?

(a) Managing several versions or releases of a software
(b) Filing bug reports and tracking their progress
(c) Allowing team members to work in parallel
(d) Identifying when and where a regression occurred
Codes:

Correct Answer: A. Only (a), (c), and (d)

74. Consider the following four processes with the arrival time and length of CPU burst given in milliseconds:

Correct Answer: A. 6.5 ms

75. Consider a virtual page reference string 7, 0, 1, 2, 0, 3, 0, 4, 2, 3, 0, 3, 2, 1, 2, 0, 1, 7, 0, 1. Suppose a demand paged virtual memory system running on a computer system such that the main memory has 3 page frames. Then __________ page replacement algorithm has minimum number of page faults.

Correct Answer: D. Optimal

76. User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads.

Which of the following statements is/are true?
(a) (i) The Many - to - one model maps many user threads to one kernel thread
(ii) The one - to - model maps one user thread to one kernel thread
(iii) The many - to - many model maps many user threads to smaller or       equal kernel threads

(b)  (i) Many - to - one model maps many kernel threads to one user thread
(ii) One - to - one model maps one kernel thread to one user thread
(iii) Many - to - many model maps many kernel threads to smaller or equal user threads

Codes:

Correct Answer: A. (a) is true; (b) is false

77. Consider the following statements regarding 2D transforms in computer graphics:

Correct Answer: B. Only S₁ is true

78. Consider a disk queue with requests for I/O to blocks on cylinders 98, 183, 37, 122, 14, 124, 65, 67. Suppose SSTF disk scheduling algorithm implemented to meet the requests then the total number of head movements are __________ if the disk head is initially at 53.

Correct Answer: C. 236

79. The Bounded buffer problem is also known as ________ .

Correct Answer: A. Producer - consumer problem

80. In Artificial Intelligence (AI), which agent deals with happy and unhappy state?

Correct Answer: D. Utility based agent