PGT Computer Science (Level-3), (HTET Exam 2019)

Total Questions: 150

141. Consider a directed graph G = {V, E} with vertex set V = {A, B, C, D} and edge set E = {AB, AC, BC, BD, DC}. Which of the following is a valid topological ordering of graph G?

Correct Answer: D. ABDC

142. Which of the following set of operations is a valid set of aggregate operations in SQL?

Correct Answer: A. COUNT, MAX, AVG, SUM

143. In context of C++, which of the following is invalid statement?

Correct Answer: C. Static data member of class can be accessed only by static member function of the class.

144. In a three level memory hierarchy, the access time of cache, main and virtual memory is 5 nano-seconds, 100 nano-seconds and 10 milli-seconds respectively. If the hit ratio is 80% for the cache and 99.5% for the main memory, then the closest average access time of memory hierarchy in nano-seconds is:

Correct Answer: C. 10024

145. Fill in the blank in context of software system architecture:

In _____ architecture, the processing of the data in a system is organized so that each processing component is discrete and carries out one type of data transformation. The data flows from one component to another for processing.

Correct Answer: A. Pipe and filter

146. In MS-Excel-2007, which of the following is found in the home tab Clipboard group?

Correct Answer: C. Format Painter

147. Value of (34.36)₁₀ in binary is:

Correct Answer: D. (100010.010111)₂

148. Which of the following is not a phase or activity of requirement engineering in context of software engineering?

Correct Answer: D. Component specification

149. Which of the following is not related to synchronization in Operating System?

Correct Answer: D. Belady's Anomaly

150. Let A and B are two devices used to play video games. In A there is provision of a handle on a base and buttons for pressing/revolving, while video games are played using B holding it in both the hands and moving it in the air this or that side. Most suitable names for A and B in order are:

Correct Answer: A. Joy-Stick, Game Pad