Cisco Interview Questions

Excerpts from Interview #1:
(PEC student having Xth score 85.5%, XIIth score 82% and graduation score 77.8%)
Technical Interview I :
  • If you are not having a size of operator in C, how will you get to know the size of an int ?
  • Write a macro to set the nth bit ?
  • Can you use a variable in a file using extern which is defined as both static and global in base file?
  • When we declare union in C, how is the size of union allocated in the memory?
  • What is the boundary problem in allocation of size of structures?
Technical Interview II :
  • Write a program to reverse a linked-list.
  • What is balanced binary tree
  • What is the difference between user and kernel space?
  • What is real time OS and how it's different from other OS?
  • Define signal and interrupt handling.
HR Interview:
  • Do you have any problem in relocation?
  • How do you take personal conflicts?
  • What are your strengths and weaknesses
  • Are you available for internship in the 8th semester
Excerpts from Interview #2:
(PEC student having Xth score 89%, XIIth score 85% and graduation score 82.8%)
Technical interview I :
  • How does Insertion sort differ from binary sort. Explain line by line (they provide rough sheets)
  • Define OSI layers and tell us their functions
  • Questions on Microprocessors
  • Tress, program on insertion of node in single linked list
Technical interview II :
  • Explain Pre order, in order, post order with examples
  • What do you understand by the sliding window protocol?
  • Write a C program for printing numbers into words such as 123 (one hundred and twenty three)
  • Explain your project and its applications.
HR Interview:
  • Why do you want to be part of CISCO?
  • What do you know about our company?
  • Are you willing to work for long hours, if required?
  • Any questions you want to ask?
Excerpts from Interview #3:
(PEC student having Xth score 95.2%, XIIth score 94.8% and graduation score 89.0%)
Technical interview I :
  • Question on determining the min number of NAND gates required to represent an expression with an expression being given in SOP form.
  • Question on FET- which terminal of FET is forward biased and which is reversed ?
  • If you were made responsible for packet delivery in correct order how would you ensure without the help of any underlying layer.
Technical interview II :
  • What did you do in the project, how did you go about it and what all did you gain from it.
  • Questions on networking basic-such as tell us the 7 layers of networking
  • Do you know anything about the OSI architecture
  • Difference between frame and packet
  • What is the Kruskal minimum spanning tree algorithm and its application in networking.
HR Interview:
  • What are your other interest?
  • What can you do if I make you the Cisco student partner?
  • How have you contributed in your college events?
  • What kind of expectation you have from this job
Excerpts from Interview #4:
(PEC student having Xth score 83.8%, XIIth score 89.8% and graduation score 81.24%)
Technical interview I :
  • Question on bit magic- counting set bits in an integer, finding absolute value of integer
  • Questions from OOP- encapsulation, polymorphism
  • What is data encryption and its difference from encapsulation.
  • What is encapsulation in Java.
  • Explain polymorphism in Java with an example.
Technical interview II :
  • What is cryptography, data transmission, TCP, UDP?
  • Why TCP is better than UDP? What is flow control and congestion control? How do networks ensure congestion control?
  • What is the difference between Router and Bridge and Gateway?
  • What is the difference between router and switch?
HR Interview:
  • What is the meaning of your name?
  • He asked me about my family background.
  • Is relocation an issue for you?
  • What are your strengths?
Excerpts from Interview #5:
(PEC student having Xth score 91.4%, XIIth score 89.8% and graduation score 79.42%)
Technical interview I :
  • How does a network ensure that all the packet reach in correct order, which layer is responsible for it.
  • How would you ensure that all your data AES-encrypted is not decrypted using any other mechanism for a software implementing all three mechanism mentioned above.
  • How does Google encrypt mails using different schemes and how client server architecture works?
  • Check if this string (written on a paper) is palindrome or not.
Technical Interview II :
  • Have you read anything about routing and switching?
  • Questions on OS- processes and thread, what is the difference between them
  • What is concurrency and what is semaphore.
  • What is masters theorem – explain the underlying cases
HR Interview:
  • What is the difference between smart work and hard work?
  • Introduce yourself.
  • List some of your achievements?
  • What according to you was your greatest failure in life?
Excerpts from Interview #6:
(CGPA 6.77 in Graduation, 84% in 12th and 78.4% in 10th).
Technical interview I :
  • State difference between user and kernel space.
  • Can you state at least two advantages of Win NT over WIN 95?
  • What is a semaphore?
  • What do you mean by real time OS?
  • What is a heap sort?
  • What is the character set used in java 2.0?
  • What language is used for artificial intelligence?
HR Interview:
  • Who is the president of Norway?
  • Where do you see yourself after 2 years?
  • What is your biggest weakness?
  • Explain your personality in one word.
  • What is the one thing that you regret in your life?
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