1.Which of the following is the binary representation of (6.625) 10?
(A) 101.101
(B) 101.11
(C) 110.101
(D) 110.11
(E) 111.11

87. X in limited amount is present in soil and is essential for plants nutrients but if present in high concentration can be harmful both for plants, animals and aquatic organisms. What is X? (A) Hydrogen sulphide (B) Carbon dioxide (C) Ammonia (D) Water (E) All of above

88.Which of the following electrodes are commonly used as a reference electrode in voltammetry? (A) Platinum wire (B) Carbon paste (C) Mercury thin film (D) Gold disk (E) Silver chloride-coated silver wire

89.In fall 2017, clouds of ruthenium-106 (106Ru) radioactive contamination appeared over Eastern Europe. Scientists measured the airborne radio-ruthenium isotope ratio (103Ru/106Ru) and confirmed its concentration. Which of the following techniques is the most suitable for the detection of the103Ru/106Ru ratio? (A) Inductively coupled plasma mass spectrometry (ICP-MS) (B) Matrix-assisted laser desorption/ionization-time of flight mass spectrometry (C) Electrospray ionization mass spectrometry (D) Fourier-transform ion cyclotron resonance mass spectrometry (E) Elemental analyzers

90, Capillary electrophoresis is powerful in detecting various genetic diseases, such as Thalassemia and Spinal Muscular Atrophy. Which of the following modes in capillary electrophoresis is the most suitable for diagnosing genetic disease (i.e., separation of DNA molecules)? (A) Capillary zone electrophoresis (B) Capillary isoelectric focusing (C) Micellar electrokinetic chromatography (D) Capillary electrochromatography (E) Capillary gel electrophoresis

2.If you have a disk that has a capacity of Petabyte (PB), that is equal to (A) 2 to the 20th power of bytes (B) 2 to the 30th power of bytes (C) 2 to the 40th power of bytes (D) 2 to the 50th power of bytes (E) 2 to the 60th power of bytes

3.How many bits in length are used for IP address in IPv4? (A) 4 (B) 8 (C) 16 (D) 32 (E) 64

4.Which of the following statement about the Unicode is not true? (A) An extended version of the ASCII (B) It contains 256 characters (C) It is not only for English but also international use (D) It is designed to be a superset of ASCII (E) Each character is encoded with 16 bits

5.Three security goals are_________. (A) Confidentiality, cryptography, and nonrepudiation (B) Confidentiality, encryption, and reliability (C) Confidentiality, integrity, and availability (D) Confidentiality, denial of service, and masquerading (E) Reliability, nonrepudiation, and masquerading

6.If the longest path in a binary tree contained exactly four nodes, what is the minimum number of nodes that could be in the entire tree? (A) 4 (B) 5 (C)7 (D)8(E) 15

7.Which of the following data structures is static in the sense that it does not change size as data items are inserted or deleted? (A) Array (B) Singly linked list (C) Queue (D) Stack (E) Tree