Texas Instruments DFT Engineer Interview Questions and Answers

Q1. Toggle the bits of given input
Ans. 
Toggle the bits of given input
• Create a mask with all bits set to 1

• XOR the input with the mask to toggle the bits

• Repeat the process for each bit position
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Q2. Clear the set bit
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Q1. Print the star pattern
Ans. 
Print a star pattern using loops
• Use nested loops to print the desired pattern

• Increment the number of stars in each row to create the pattern

• Example: for a pattern with 5 rows - * , ** , *** , **** , *****
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Q2. Microprocessor microcontroller topics are asked
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Basic aptitude-10 question,digital moderate -Question,analog moderate -10 question,verilog and system verilog -10 question

Q1. Latches and flip flop all characteristics equation and proof of the characteristics equation in flip flop.applications of flip flop
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Q2. OOPS,INHERITANCE,VERILOG,BLOCKING - NON BLOCKING ASSIGNMENT OPERATOR and all the basic operations of verilog .
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Q3. Discussion on work experience.
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Q1. Why do you want to join ASML
Ans. 
ASML is a global leader in lithography technology, and I am excited about the opportunity to work on cutting-edge projects in the semiconductor industry.
• ASML is a global leader in lithography technology

• Excited about working on cutting-edge projects in the semiconductor industry

• Opportunity for professional growth and development
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Q2. What is your expectations?
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I expect a challenging role where I can utilize my skills in embedded software development and contribute to innovative projects.
• Expect to work on cutting-edge technologies in embedded systems

• Desire to collaborate with a talented team to solve complex problems

• Seek opportunities for professional growth and skill development

• Expect a supportive work environment that values creativity and innovation
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Q3. Do you have valid visa?
Ans. 
Yes, I have a valid visa.
• Yes, I have a valid visa that allows me to work in this country.

• My visa is valid until [expiration date].

• I have all the necessary documentation to prove my visa status.
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Q4. How did you hear about ASML?
Ans. 
I heard about ASML through a job search website.
• Job search website

• Online job board

• Referral from a friend who works at ASML
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5-6 programming multiple choice questions on C++ and a problem to be solved with any language

Q1. Simple FSM given similar to mux and asked for testcases and assertions.
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Q2. Coverage to write transitions of states.
Ans. 
Coverage-driven verification techniques are used to ensure all possible state transitions are exercised.
• Coverage metrics like state, transition, and toggle coverage can be used to track the completeness of state transitions.

• Writing directed tests to cover specific state transitions can help achieve higher coverage.

• Random stimulus generation can also be used to explore different state transitions.

• Functional coverage can...read more
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Q1. Basics of analog , digital and vlsi
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Q2. On face to face interview, they asked me abt my projects , digital, little analog , vlsi ( verilog), microcontrollers and c programming
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Q1. Floorplan strategies to calculate maximum macro counts that can be used in a block, placement constraints, congestion issues.
Ans. 
Floorplan strategies involve calculating maximum macro counts, considering placement constraints and addressing congestion issues.
• Floorplan strategies involve determining the maximum number of macros that can be accommodated within a block.

• Placement constraints refer to the rules and guidelines that dictate where macros can be placed within the block.

• Congestion issues arise when there is limited space or resources avai...read more
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Q2. Multi cycle paths, timing violations in reg2reg path.
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Q3. Routing issues, signal integrity, IR drop analysis.
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Q4. Logical DRC's, causes and fixing strategies.
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Q1. Issues and fixes faced during previous projects.
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Q2. Placement, CTS, CMOS concepts
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Q3. LVS, Design for manufacturing.
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Q1. Temperature of the design you worked for?
Ans. 
The temperature of the design I worked on was optimized to ensure proper functionality and reliability.
• The temperature was carefully controlled to prevent overheating and ensure performance.

• Thermal analysis was conducted to determine the optimal operating temperature.

• Cooling solutions such as heat sinks or fans were implemented to manage heat dissipation.

• Examples: The design operated within a temperature range of 0-70 ...read more
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Q2. Mention the corners you worked in
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