IBPS SO IT Officer Professional Knowledge Daily Mock 20 January 2020: Networking, Programming

Today’s IBPS SO IT Quiz based on-Networking and other important topics. Mains examination of IBPS SO is going to take place on 25th January 2020. So, Student, there is very few days left for the mains examination. So, Follow the study plan and clear your concept.

Q1. The purpose of the _______ is to provide flow and error control for the upper-layer protocols that actually demand these services.
(a) MAC
(b) LLC
(c) LLU
(d) none of the above
(e) NIC

Q2. The DNS maps the IP address to which of the following?
(a) A binary address as strings
(b) An alphanumeric address
(c) A hierarchy of domain names
(d) A hexadecimal address
(e) None of these

Q3. The network 198.78.41.0 is related to which IPv4 class?
(a) Class A network
(b) Class B network
(c) Class C network
(d) Class D network
(e) None of these

Q4. Which one of the following protocols is NOT used to resolve one form of address to another one?
(a) DNS
(b) ARP
(c) DHCP
(d) RARP
(e) Both (a) and (b)

Q5. In a compiler, keywords of a language are recognized during which phase?
(a) parsing of the program
(b) the code generation
(c) the lexical analysis of the program
(d) dataflow analysis
(e) None of these

Q6. Which operation is used to extract specified columns from a table?
(a) Project
(b) Join
(c) Extract
(d) Substitute
(e) None of these

Q7. Which of the following protocol provides confidentiality and authentication for an e-mail?
(a) PGP
(b) SMTP
(c) TELNET
(d) FTP
(e) DNS

Q8. Which of the following is not correct for virtual function in C++?
(a) Must be declared in public section of class.
(b) Virtual function can be static.
(c) Virtual function should be accessed using pointers.
(d) Virtual function is defined in base class.
(e) None of these

Q9. Which of the following, in C++, is inherited in a derived class from base class?
(a) constructor
(b) destructor
(c) data members
(d) virtual methods
(e) None of these

Q10.Which operator allows to specify multiple values in a WHERE clause?
(a)ORDER BY
(b)IN
(c)SORT
(d)LIKE
(e)BETWEEN

Solutions

S1. Ans.(b)
Sol. “Media Access Control Address,” and no, it is not related Apple Macintosh computers. A MAC address is a hardware identification number that uniquely identifies each device on a network.

S2. Ans.(c)
Sol. DNS maps the IP addresses into a hierarchy of domain names. DNS root zone is the highest level in the DNS hierarchy tree. The root zone contains the following: 1) Organizational hierarchy such as .com, .net, .org, gov 2) Geographic hierarchy such as .uk, .fr, .in.

S3. Ans.(c)
Sol. In classful addressing, the range of first octet should be between one of the following:
CLASS A- 0 to 127
CLASS B – 128 to 191
CLASS C – 192 to 223
CLASS D- 224 to 239
CLASS E- 240 to 255
Given IP address = 198.78.41.0 So, it is a class C address.

S4. Ans.(c)
Sol. DNS converts domains to IP, ARP converts IP to MAC, RARP converts MAC to IP.
So, all these three protocols are used to resolve one form of address to another one. But DHCP is used to assign IP dynamically which means- it doesn’t resolve addresses.

S5. Ans.(c)
Sol. Lexical analysis is the process of converting a sequence of characters into a sequence of tokens.
S6. Ans.(a)
Sol. Projection (π) Projection is used to project required column data from a relation.

S7. Ans.(a)
Sol. Pretty Good Privacy (PGP) Pretty Good Privacy or PGP is a popular program used to encrypt and decrypt email over the Internet, as well as authenticate messages with digital signatures and encrypted stored files.

S8. Ans.(b)
Sol. Virtual function is can’t be static in C++.

S9. Ans.(c)
Sol. Data members in C++ is inherited in a derived class from base class. Constructor is a member function of a class which initializes objects of a class. In C++, Constructor is automatically called when object (instance of class) create. It is special member function of the class. Destructor is a member function which destructs or deletes an object. Virtual methods is a method which is redefined(Over-ridden) in derived class.

S10. Ans.(b)
Sol. The IN operator allows you to specify multiple values in a WHERE clause.

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