美國ARM(安謀) AE面試心得分享 - 工程師
By Regina
at 2016-11-08T13:23
at 2016-11-08T13:23
Table of Contents
小弟美國某大學電機碩畢
前幾天在ARM面試AE(application engineer)的職位
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一開始先是有朋友推薦以及曾經在該公司做過一年實習
所以主管有先打電話來寒暄幾句跟我說明職務內容
接下來主管的主管又打來一次也是問些以前的實習經驗
阿 然後聽到我母語是中文好像有點興趣
因為ARM在中國跟台灣都有客戶 常常被要求有中文簡報
之後人資又打來問之前的實習, 研究所時的project等等
雖然是覺得人資問這些怪怪的 他也聽不懂XD
接下來就被邀請去公司面試
面試我的有5位資深工程師/經理 以下把每位的內容大略講一下
有些附上我的答案, 不一定正確XD 有些太難翻成中文就不翻了
1. 先說明職務, 之後開始問問題
DFT是什麼? 為何需要? 我: design for test, 測試晶片是否
有stuck at fault, 或是slow to rise/fall fault.
簡單說明scan chain? 我: A way to set FFs to certain state
and compare execution result with golden model.
如何在拿到晶片後測試SRAM? MBIST, 連續寫入00000/111...再檢查結果
如何降低dynamic power? 我: clk gate, multi-Vdd, DVFS, 用小一點
的gate
解釋upf? 我: uniform power format(IEEE standard) 內含voltage
domain, level shifter, power target, operation mode..blah blah
2. 一來就硬上阿不是...開始問問題XD
解釋implementation flow? 我: library set up, synthesis, power
planning, floorplanning, placement, CTS, routing, DRC/LVS, ECO, DFM
STA(static timing analysis)問題, slow corner/fast corner.
舉出不同clk tree? 我: H-tree, spine, mesh, link...
clk skew/jitter原因? 我: OCV(voltage, process, temperature)
jitter則是thermal noise, supply voltage noise
問: 若有人給你一個滿江紅的timing report, 你覺得那些地方有問題?
我: clk tree design, clk buffer, clk gate, noise, blockage, placement
這一個有點硬, STA那邊有點被洗臉
3. 邊吃飯邊聊
問問以前在公司實習做了什麼 講一些工作上如何適應
中間聊到我其實有丟google/amazon 他問:有回復嗎? 我: 沒有> <
4. 工作的主管, 一進來也是講了一大堆工作相關介紹
問: 如何減少leakage power? 我: multi-vt, power gating, reverse
body bias, stacking, header/footer, input vector control,
retention FFs.
5. 這個也是有點硬 很快打發自我介紹那些切入正題
問: synthesis tool input 有哪些? 我: physical lib, timing lib, netlist,
upf, technology file, SDC(synopsys design constraints), I/O lib,
SPEF(standard parasitic exchange format)
問: floorplanning 要做哪些動作? 我:die size, utilization, orientation,
aspect ratio, power tracks, hard macro placement, blockages, bounds, pin
pads location
問: 如何解決hold violation? 我: delay lauching flop clock, add delay
buffers to combinational logic
問: 若延遲發出端flip-flop 的 clk, 要注意什麼? 我: 若有別的線路進入發出端
flip-flop, 則該FF也可能因此有hold violation. 可能修一個壞一個
他: 好啦...問得差不多惹 拍謝問太多 你答得不錯
6. 人資小姐
問我每個人都跟我聊了啥
問: 有別的公司正在面試你嗎? 我: 沒有所以掰了個intel
問: 面試的職務? 我: 靠杯阿問那麼多... verification啦
問: 請問你能夠為公司馬上帶來什麼貢獻? 我只說了我的一些優點QQ
ok等我們面試完所有人再給你答覆 (我之外還有幾個求職者)
完全沒有提到待遇問題!!! QQ 本來還想問問有沒有85K USD/年....
目前抖抖等通知中
恩 大概就這樣惹 希望有幫到版眾或是幫大家了解一些國外面試流程
希望不要再有打下篇的機會了 QQ
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